An earthquake was recorded close to the Katla volcano in Iceland earlier this week. Located under the Mýrdalsjökull glacier in the south of the island, Katla is not only one of the country's most notorious volcanoes, it is also well overdue an eruption. When it does blow the fallout is expected to be far more disruptive than the eruption of Eyjafjallajökull in 2010, which led to the worst travel disruption in Europe since the Second World War. Earthquakes are common before volcanic eruptions - as such volcanologists are keeping an ever closer eye on Katla, reports Iceland Magazine.